

Best for intermediate divers, 10-30m, boat entry, moderate current.
Jan's Tunnel is a cave and wall dive located within RikoRiko Cave at the Poor Knights Islands. Divers typically access the site by boat, with depths ranging from 10 to 30 metres and an average depth of 15 metres. The tunnel entrance begins at approximately 19 metres and gradually shallows to 10 metres. The site features a wall and cave topography that requires intermediate skill due to the overhead environment, potential surge, and risk of entanglement. Water temperatures fluctuate between 16C and 21C throughout the year. As this is a boat-only site located 23 kilometres from shore, divers should coordinate with local boat charters for access.
-35.48785, 174.73628
Plan entry timing for high tide to ensure adequate water depth over the rocky approach and optimal current flow through the tunnel system.
Boat access is required to reach the site on Aorangi Island.
Recorded at this site
Depth
10-30m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
16-21°C
Current
Moderate
Best Time
Jan, Feb, Mar
The site ranges from 10 to 30 metres deep, with an average depth of 15 metres.
No, this site is rated for intermediate divers due to the overhead environment, surge, and risk of entanglement.
Access is by boat only, as the site is located 23 kilometres from the shore.
Water temperatures range from 16C in winter months to 21C in February.
Diving at Jan's Tunnel in North Island requires the following certifications: Open Water. Always dive within your training limits.
Yes, equipment rental is available at or near Jan's Tunnel in North Island. Contact local dive operators for specific gear availability and prices.
A 7mm wetsuit or semi-dry is recommended for diving at Jan's Tunnel in North Island. Water temperatures range from 16°C to 21°C.
The best months to visit Jan's Tunnel in North Island are January, February, and March. Conditions outside these months can still be good but are less predictable.